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Nuclear ______ be really dangerous at ti...

Nuclear ______ be really dangerous at times even though it’s a nice energy in general.

A. shall   B. should  C. can  D. must

 

C 【解析】 试题分析:考察情态动词的用法。A. Shall在陈述句中与第二、第三人称主语连用,表示说话者给对方的承诺、决心、警告等。B. Should,表示谦逊、客气、委婉之意,译为“可…”;可以用了表示意外、惊喜等。C. can表示能力、许可、推测。D.必须,命令,强制的口气。句意:大体上说,即使核能是一项很好的能源,但是它有时可能十分危险。故选C。 考点:考察情态动词的用法  
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